"As a family, for the last nine months it's been like living out your worst nightmare," she said.

"Every aspect of our lives has been affected to some degree."

Bishop Bell School has faced controversy over people linked to it in the past.

Canon Gordon Rideout, 74, an ex-chairman of governors, was jailed for 10 years in May for abusing more than a dozen vulnerable girls and boys at a now closed Barnardo's home in Crawley, West Sussex, over a four-year period.

The former Anglican priest also indecently assaulted two girls at an Army site in Middle Wallop, Hampshire.

In 2009, supply teacher Robert Healy, then aged 27, was jailed for seven years at Lewes Crown Court after grooming two Bishop Bell pupils on the social networking site Bebo.

He had sex three or four times with one teenage victim and then started a second relationship with a slightly older girl.

A safeguarding review published in April did not find evidence of "any significant or systemic failings in safeguarding" at Bishop Bell School.

In a statement released after the verdict, Terry Boatwright, head teacher of Bishop Bell School said: "In terms of our investigations, until September 2012, the school only had very limited anecdotal hearsay and no evidence of a relationship.

"However, even so, everything was investigated following appropriate safeguarding procedures.

Media captionThe Crown Prosecution Service said Forrest had "brought disgrace to his profession"

"Prior to the events of September 2012 and the formal child protection investigation that took place then, the school had investigated reported concerns, involving the Local Authority at the appropriate points and following its advice.

"At no point did the school find evidence of a relationship and at no point did the reported concerns reach the threshold to involve the police formally."

Mr Boatwright said the police became formally involved in September 2012 "when further, and more serious, concerns were raised".

"At that point, in line with standard practice, the school shared its information with the police and other agencies," he said.

"Even then, having that information and after investigating more serious concerns than the school had received, the police informed the school that they too had found no evidence to support arresting Mr Forrest and handed the matter back to the school.

"At that point, it was the school's intention to refrain Mr Forrest from work whilst it undertook a further investigation of its own into possible professional misconduct. However, Mr Forrest never returned to work after 19th September."